The theory of set pair analysis is applied in the evaluation of groundwater quality in order to solve the fuzzy nonlinear relationship between evaluation factors and standards. To avoid people' s subjectivity in the weights of various indexes in the evaluation process, the information entropy theory is employed, a set pair analysis model is established based on the entropy weight. The results of this model are compared with those of fuzzy comprehensive evaluation. It is shown that the set pair analysis method based on the entropy weight is easy in understanding its principles and simple in its calculation and can make full use of the data so as to reduce errors and to reflect the comprehensive quality of water. It may provide a reasonable and effective evaluation method for the evaluation of groundwater quality.%为解决地下水水质评价中评价因子与评价标准之间模糊、非线性的复杂关系,将集对分析理论应用于地下水水质评价中.为避免评价过程中个人赋予评价指标权重的主观性,引用信息论中的熵权理论,建立基于熵权的集对分析模型.并将其评价结果与模糊综合评价结果比较,评价结果表明,基于熵权的集对分析方法,不仅原理易懂、计算简便,而且能充分利用所有数据,减少误差,反映水体综合质量,为地下水质量评价提供了一种合理可行的方法.
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